According to the Global Ranking of Academic Subjects (GRAS) by Jiao Tong University in Shanghai SISSA mathematics area ranks in the top 75 internationally together with the University of Milan and the Sapienza University of Rome.
GRAS ranked universities on the basis of the publications in the period 2015-2019 on 54 different disciplines covering Natural Sciences, Engineering, Life Sciences, Medical Sciences and Social Sciences. The ranking involves more than 1800 universities in 93 countries and is based on different indicators. These include publications, international collaborations, international awards and the quality of research.
"From a quick analysis in the composition of the score, the weight of citations and internationalization stands out. An extraordinary result, given that the ranking does not take into account dimensional factors: compared to other internationa realities, ours is a small department" commented the Director of SISSA Stefano Ruffo.
The full ranking is available here.